﻿<!DOCTYPE html>

<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title></title>
</head>
<body>
    <script>
        var age = 4;
        var str = 'afds';
        console.log(age > 4 && str.length == 4);
        console.log(age == 4 && str.length == 4);
        console.log(!(age > 4));
        console.log(!(age == 4));
    </script>
</body>
</html>